Rag-engine.



No. 836,460. PATENTED NOV. 20, 1906.

B. A. PETERSON.

RAG ENGINE.

APPLICATION mum AUG.16. 1906.

flu: NORRIS PEI-Ins cm, WASHINGTON, b. c,

UNITED STATES PATENT OFFICE.

EMIL A. PETERSON, OF APPLETON, WISCONSIN, ASSIGNOR TO VALLEY IRON WORKS 00., OF APPLETON, WISCONSIN, A CORPORATION OF WISCONSIN.

RAG-ENGINE.

Specification of Letters Patent.

Patented Nb'v. 20, 1906:

Applicatiou'filed August 15, 1906- Serial No. 330,690-

To all when it may concern:

Be it known that I, EMIL'A. PETERSON, a citizen of the United States, residing at Appleton, county of Outagamie, and State of Wisconsin, have invented new and useful Improvements in RagEngi nes, of which the following is a specification.

My inventionrelates to improvements in rag-engines, and pertains especially to the construction of the stationary member, including the front fall, back fall, and the box or trough for the stationary cutters.

The object of this invention is to provide a series of metallic sections which can be secured together to form an absolutely rigid, hard, and continuous surface composing the front fall, the knife-box, and the back fall, the several sections being secured together in such a manner as to reinforce each other and present the same continuity for practical purposes as if all the parts were integrally formed in a single casting.

In the following description reference is had to the accompanying drawings, in which Figure 1 is a plan view of a rag-engine embodying my invention. Fig. 2 1s a perspective View of the stationary member removed from the reservoir in which the engine operates.

Like parts are identified by the same reference characters throughout both views.

A rotary knife-carrying drum 1 is supported by a shaft 2 in a position to revolve in a vat 3 at one side of a median wall or midfeather 4, the vat being usually oval in form, and the pulp-stock being drawn by the drum over an upwardly-inclined approach or front fall and forced with a scraping movement over stationary knives arranged in a suitable trough directly underneath the drum and then upwardly and over a back fall having a concave surface diverging rearwardly from the drum. These general features in rag-engines are well known and do not require description in detail.

In the construction of such engines, however, it has heretofore been customary to form the front and back falls and the knifetrough of wood and to secure them independ ently in position with metallic sheathingirons at the points of greatest wear. Each part, therefore, resisted strains independently, the front fall being subject to no strain, while that upon the back fall was excessive.

Referring to Fig. 2, it will be observed that the front fall is composed of two sections, the first section 6 having a depressed flange 7 along its rear margin adapted to receive an abutting margin of the section 8, which is provided with a similar depressed flange 9, adapted to receive a flange 10 on the knifebox 1 1. The opposing or rear side wall of the box is provided with a depressed flange 12, which receives the first section 13 of the back fall, and this section 13 extends beyond the apex 14, where it is provided with a depressed flange 15, which receives the rear section 16. Bolts or rivets 18 extend through the depressed flanges andconnect the respective sections, which form a continuous smooth metallic surface. The sections 13 and 15 of the back fall are provided with bed-flanges 20, and bars 21 rest upon the flanges and connect the lower margins of these sections, the

space between and beneath the sections being preferably filled with concrete in order to add weight and stability to the structure.

The box 11.is preferably provided with base-flanges 23, which are adapted to engage under or be embedded in the floor of the vat.

It will be observed that with the described structure I not only provide a c0ntinuous metallic surface for the stationary member of the engine, but also provide for distributing the strain caused by the backward pressure and torque of the rotary member upon the stock.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a machine of the described class, a stationary member comprising a series of metallic sections rigidly connected together and arranged to form a front fall, a knifetrough and a back fall, and being rigidly conto holding trough and a back fall, all having a nected for mutual reinforcement and districontinuous metallic upper surface. bution of strains.

2. In a machine of the described class, a In testimony whereof I aflix my signature stationary member comprising a series of mein the presence of two Witnesses.

tallic sections, each having a depressed flange EMIL A. PETERSON. receiving the margin of the succeeding sec- Witnesses: tion, and bolted thereto; said sections being H. O. SLOAN,

arranged to form a front fall, a knife-holding C. G CANNON. 

